A few things that don't cost any money at all, just time... cynical comebacks [lest anyone mistake you for depressed, as opposed to truly evil, bwahahahaaaaa!]... and you need to practice being a bad guy, to fine-tune your skills... if it's good enough for the US military, it's good enough for you!

A lack of knowledge has tripped up many attempts at seizing world power; learn from some former world conquerors what to do/not do in your quest for ultimate power, learn about the good guys, ... and how to defeat them with a minimum of fuss, so that you can enjoy the fruits of your ill-gotten gains!